Overview
The LP2951ACMMX/NOPB is a low-dropout voltage regulator produced by Texas Instruments. It is part of the LP2951 series, known for its high accuracy, low quiescent current, and low dropout voltage. This regulator is ideal for use in battery-powered systems due to its minimal power consumption and robust performance characteristics. The LP2951ACMMX/NOPB is available in a VSSOP-8 package and offers features such as a logic-controlled electronic shutdown, an error flag for output dropout, and programmable output voltage from 1.24 V to 29 V.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 2.3 V to 30 V | V |
| Output Voltage Options | Fixed: 5 V, 3 V, 3.3 V; Programmable: 1.24 V to 29 V | V |
| Output Current | 100 mA | mA |
| Quiescent Current | 75 µA (typical) | µA |
| Dropout Voltage | 40 mV (typical at light loads), 380 mV (typical at 100 mA) | mV |
| Line Regulation | 0.03% to 0.2% | % |
| Load Regulation | 0.04% to 0.2% | % |
| Output Voltage Temperature Coefficient | 20 to 150 ppm/°C | ppm/°C |
| Package Type | VSSOP-8 | |
| Operating Temperature Range | -40°C to 125°C | °C |
Key Features
- High accuracy output voltage with a tight initial tolerance (0.5% typical)
- Extremely low quiescent current (75 µA typical)
- Low dropout voltage (typical 40 mV at light loads and 380 mV at 100 mA)
- Logic-controlled electronic shutdown
- Error flag output to warn of low output voltage
- Programmable output voltage from 1.24 V to 29 V using external resistors
- Internal protection circuitry including foldback current limit and thermal shutdown
- Stable with low-ESR output capacitors (10 mΩ to 6 Ω)
Applications
- High-efficiency linear regulator
- Regulator with undervoltage shutdown
- Low dropout battery-powered regulator
- Snap-ON/Snap-OFF regulator
- Battery-powered systems requiring low power consumption and high accuracy voltage regulation
Q & A
- What is the input voltage range of the LP2951ACMMX/NOPB?
The input voltage range is from 2.3 V to 30 V. - What are the available output voltage options for the LP2951ACMMX/NOPB?
The output voltage can be fixed at 5 V, 3 V, or 3.3 V, or programmable from 1.24 V to 29 V. - What is the typical quiescent current of the LP2951ACMMX/NOPB?
The typical quiescent current is 75 µA. - What is the dropout voltage of the LP2951ACMMX/NOPB?
The dropout voltage is typically 40 mV at light loads and 380 mV at 100 mA. - Does the LP2951ACMMX/NOPB have built-in protection features?
Yes, it includes foldback current limit and thermal shutdown. - How can the output voltage be programmed?
The output voltage can be programmed from 1.24 V to 29 V using an external pair of resistors. - What is the operating temperature range of the LP2951ACMMX/NOPB?
The operating temperature range is from -40°C to 125°C. - What package type is the LP2951ACMMX/NOPB available in?
The LP2951ACMMX/NOPB is available in a VSSOP-8 package. - Is the LP2951ACMMX/NOPB suitable for battery-powered systems?
Yes, it is highly suitable due to its low quiescent current and low dropout voltage. - Does the LP2951ACMMX/NOPB have an error flag feature?
Yes, it has an error flag output that warns of low output voltage.
